<template>
	<view class="uni-load-more">
		<view v-if="iconType==='circle' || iconType==='auto' && platform === 'android'" v-show="_status === 'loading' && showIcon"
		 class="uni-load-more__img">
			<view :style="{borderColor : color}" class="loader-android" />
		</view>
		<view v-else v-show="_status === 'loading' && showIcon" class="uni-load-more__img">
			<view class="load1 load">
				<view :style="{ background: color }" class="uni-load-view_wrapper" />
				<view :style="{ background: color }" class="uni-load-view_wrapper" />
				<view :style="{ background: color }" class="uni-load-view_wrapper" />
				<view :style="{ background: color }" class="uni-load-view_wrapper" />
			</view>
			<view class="load2 load">
				<view :style="{ background: color }" class="uni-load-view_wrapper" />
				<view :style="{ background: color }" class="uni-load-view_wrapper" />
				<view :style="{ background: color }" class="uni-load-view_wrapper" />
				<view :style="{ background: color }" class="uni-load-view_wrapper" />
			</view>
			<view class="load3 load">
				<view :style="{ background: color }" class="uni-load-view_wrapper" />
				<view :style="{ background: color }" class="uni-load-view_wrapper" />
				<view :style="{ background: color }" class="uni-load-view_wrapper" />
				<view :style="{ background: color }" class="uni-load-view_wrapper" />
			</view>
		</view>
		<text :style="{ color: color }" class="uni-load-more__text">
			{{ _status === 'more' ? contentText.contentdown :_status=== 'loading' ? contentText.contentrefresh : contentText.contentnomore }}
		</text>
	</view>
</template>

<script>
	const platform = uni.getSystemInfoSync().platform
	export default {
		name: 'UniLoadMore',
		props: {
			status: {
				// 上拉的状态：more-loading前；loading-loading中；noMore-没有更多了
				type: String,
				default: 'more'
			},
			showIcon: {
				type: Boolean,
				default: true
			},
			iconType: {
				type: String,
				default: 'auto'
			},
			color: {
				type: String,
				default: '#777777'
			},
			contentText: {
				type: Object,
				default () {
					return {
						contentdown: '上拉显示更多',
						contentrefresh: '正在加载...',
						contentnomore: '没有更多数据了'
					}
				}
			}
		},
		computed: {
			_status() {
				return this.status;
			}
		},
		data() {  
			return {
				platform: platform
			}
		}
	}
</script>

<style lang="scss">
	.uni-load-more {
		display: flex;
		flex-direction: row;
		height: 80upx;
		align-items: center;
		justify-content: center;

		&__text {
			font-size: 28upx;
			color: $uni-text-color-grey;
		}

		&__img {
			position: relative;
			height: 24px;
			width: 24px;
			margin-right: 10px;

			&>.load {
				position: absolute;

				.uni-load-view_wrapper {
					width: 6px;
					height: 2px;
					border-top-left-radius: 1px;
					border-bottom-left-radius: 1px;
					background: $uni-text-color-grey;
					position: absolute;
					opacity: 0.2;
					transform-origin: 50%;
					animation: load 0.96s ease infinite;

					&:nth-child(1) {
						transform: rotate(90deg);
						top: 2px;
						left: 9px;
					}

					&:nth-child(2) {
						transform: rotate(180deg);
						top: 11px;
						right: 0px;
					}

					&:nth-child(3) {
						transform: rotate(270deg);
						bottom: 2px;
						left: 9px;
					}

					&:nth-child(4) {
						top: 11px;
						left: 0px;
					}
				}
			}

			&>.loader-android {
				position: absolute;
				left: 0;
				top: 0;
				right: 0;
				bottom: 0;
				box-sizing: border-box;
				border: solid 2px #777777;
				border-radius: 50%;
				border-bottom-color: transparent !important;
				animation: loader-android 1s 0s linear infinite;
			}
		}
	}

	.load1,
	.load2,
	.load3 {
		height: 24px;
		width: 24px;
	}

	.load2 {
		transform: rotate(30deg);
	}

	.load3 {
		transform: rotate(60deg);
	}

	.load1 .uni-load-view_wrapper:nth-child(1) {
		animation-delay: 0s;
	}

	.load2 .uni-load-view_wrapper:nth-child(1) {
		animation-delay: 0.08s;
	}

	.load3 .uni-load-view_wrapper:nth-child(1) {
		animation-delay: 0.16s;
	}

	.load1 .uni-load-view_wrapper:nth-child(2) {
		animation-delay: 0.24s;
	}

	.load2 .uni-load-view_wrapper:nth-child(2) {
		animation-delay: 0.32s;
	}

	.load3 .uni-load-view_wrapper:nth-child(2) {
		animation-delay: 0.40s;
	}

	.load1 .uni-load-view_wrapper:nth-child(3) {
		animation-delay: 0.48s;
	}

	.load2 .uni-load-view_wrapper:nth-child(3) {
		animation-delay: 0.56s;
	}

	.load3 .uni-load-view_wrapper:nth-child(3) {
		animation-delay: 0.64s;
	}

	.load1 .uni-load-view_wrapper:nth-child(4) {
		animation-delay: 0.72s;
	}

	.load2 .uni-load-view_wrapper:nth-child(4) {
		animation-delay: 0.80s;
	}

	.load3 .uni-load-view_wrapper:nth-child(4) {
		animation-delay: 0.88s;
	}

	@-webkit-keyframes load {
		0% {
			opacity: 1;
		}

		100% {
			opacity: 0.2;
		}
	}

	@-webkit-keyframes loader-android {
		0% {
			transform: rotate(0deg);
		}

		100% {
			transform: rotate(360deg);
		}
	}
</style>
